Exposure module

[kindanduseful]

Exposure is different from brightness -- not sure how! But a separate Exposure module would be nice, thank you!

[gitmate]

GitMate.io thinks the contributor most likely able to help you is @jywarren.

Possibly related issues are #5 (image cropping module), #367 (Create Contrast Module), #157 (Add a Contrast module), #488 (White balance module), and #434 (Rotate module).

[gitmate]

GitMate.io thinks the contributor most likely able to help you is @jywarren.

Possibly related issues are #5 (image cropping module), #367 (Create Contrast Module), #157 (Add a Contrast module), #488 (White balance module), and #434 (Rotate module).

[aashna27]

@jywarren could you please have a look at it and then I would like to work on it.

[jywarren]

This is a great idea. Might take some research!

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On Mon, Jan 7, 2019, 3:01 PM aashna27 ***@***.*** wrote: @jywarren <https://github.com/jywarren> could you please have a look at it and then I would like to work on it. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#612 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AABfJ_qSbcL_xWlTAbw3IAIQVKBdAcSgks5vA6eGgaJpZM4ZyGLr> .

[aashna27]

Yepp.. would do 😊

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On Tue, Jan 8, 2019, 1:41 AM Jeffrey Warren ***@***.*** wrote: This is a great idea. Might take some research! On Mon, Jan 7, 2019, 3:01 PM aashna27 ***@***.*** wrote: > @jywarren <https://github.com/jywarren> could you please have a look at > it and then I would like to work on it. > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > < #612 (comment) >, > or mute the thread > < https://github.com/notifications/unsubscribe-auth/AABfJ_qSbcL_xWlTAbw3IAIQVKBdAcSgks5vA6eGgaJpZM4ZyGLr > > . > — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#612 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AZUPyLA9jIH4XGRIEyoTx_YMXthe3MIZks5vA6nhgaJpZM4ZyGLr> .

[harshkhandeparkar]

@aashna27 from what I know about this stuff, I think exposure is the amount of light entering the lens of a camera. Increase in exposure means that more light is going to enter the lens and photos in the night are going to look better and visibility will increase but with brightness the photo is only going to look brighter. If this issue is about the same exposure then I think this might not be possible digitally as it s a physical thing. Correct me if I'm wrong. @jywarren @kindanduseful

[harshkhandeparkar]

Ah I just found some info here it says that exposure depends upon physical factors such as aperture of the lens

[aashna27]

Yess this gets changed with aperture and other camera lens factors, I searched. It didn't seem feasible to me.

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On Sun, Jan 27, 2019, 12:04 PM Harsh Khandeparkar ***@***.*** wrote: @aashna27 <https://github.com/aashna27> from what I know about this stuff, I think exposure is the amount of light entering the lens of a camera. Increase in exposure means that more light is going to enter the lens and photos in the night are going to look better and visibility will increase but with brightness the photo is only going to look brighter. If this issue is about the same exposure then I think this might not be possible digitally as it s a physical thing. Correct me if I'm wrong. @jywarren <https://github.com/jywarren> @kindanduseful <https://github.com/kindanduseful> — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#612 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AZUPyHuzVjaGqRy6yXi3aP7ed9wbACaWks5vHUhogaJpZM4ZyGLr> .

[harshkhandeparkar]

So can this issue be closed as this is not possible?

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On Sun 27 Jan, 2019, 12:07 PM aashna27 ***@***.*** wrote: Yess this gets changed with aperture and other camera lens factors, I searched. It didn't seem feasible to me. On Sun, Jan 27, 2019, 12:04 PM Harsh Khandeparkar < ***@***.*** wrote: > @aashna27 <https://github.com/aashna27> from what I know about this > stuff, I think exposure is the amount of light entering the lens of a > camera. Increase in exposure means that more light is going to enter the > lens and photos in the night are going to look better and visibility will > increase but with brightness the photo is only going to look brighter. If > this issue is about the same exposure then I think this might not be > possible digitally as it s a physical thing. Correct me if I'm wrong. > @jywarren <https://github.com/jywarren> @kindanduseful > <https://github.com/kindanduseful> > > — > You are receiving this because you were mentioned. > Reply to this email directly, view it on GitHub > < #612 (comment) >, > or mute the thread > < https://github.com/notifications/unsubscribe-auth/AZUPyHuzVjaGqRy6yXi3aP7ed9wbACaWks5vHUhogaJpZM4ZyGLr > > . > — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#612 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AhKOn_eyfwn8B0b18OYUtud-mqizm3CWks5vHUktgaJpZM4ZyGLr> .

[vibhorgupta-gh]

@harshkhandeparkar @aashna27 @jywarren
done at #721

I just added the exposure module. The logic behind the module was pretty straight forward, the only catch was as aforementioned, it depended upon physical factors of ISO value, shutter speed and camera aperture. After researching a bit, I put the EV (exposure value, used to calculate/correct the image exposure) as a range of -5 to 5 with a 0.1 step size. This is a standard step size for the increment for ISO values of 100-200.
Of course, as a software handling image processing we can't handle all values of ISO available in cameras, but we can certainly handle the majority/common ones. Thoughts?

[vibhorgupta-gh]

• https://codereview.stackexchange.com/questions/28661/image-processing-algorithm-on-mobile-device
• https://photo.stackexchange.com/questions/27943/how-does-software-raise-exposure-in-post-processing

Some links I referred